Pumping device.



J. K. STEWART. DECD.

1. B. STEWART, ExEcuTRlx.

PUMPING DEVICE.

w APPLICATION F|LED OCT. I4. |915- Y l. @'Q Patented Nov. 27, 191?.

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- structed as shown, comprisin UMTED STATES PATENT @FFiWE JOHN K. STEWART, DECESED, LATE 0F NORTHPURT, NEW YORK, BY JULIE. E. STEWART, EXECUTRIX, OF NORTHPORT, NEW YORK.

FUMPING DEVICE.

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pecication of Letters Patent.

Patented Nov.. 2'?, 19M.

To all 'whom t may concern.' p

Be it known that I, JULIA B. STEWART, a citizen of the United States, residing at Northport, in the county of Suffolk and State of New York, am the eXecutriX of the last will `and testament of JOHN K. STEWART, deceased, who resided at the time of his death at Northport, Sufolk county, in the State of New York, and who had invented new and useful Improvements in Pumping Devices, of which the following is a specification, reference beinghad to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved pumping device particularly designed for pumping-liquid fuel or lubricating oil from a low level main supply tank to a higher level supplementary reservoir for furnishing fuel or lubrication to an internal 4combustion engine, but not limited to this specic use. It consists in the elements and features of construction shown and described as indicated in the claims:

Figure 1` is a plan view of a deviceembodyin'g this invention.

Fig. 2 is an axial section at the line 2-2 on Fig. 1.

Fig. 3 is a detail section of a modification. v

rllhc structure shown in the drawin comprises a casing which is convenient y conwall, A, a back or bottom wa l, formed by; a plate, B, forced or threaded tight into the annular wall, A, at one side. rlhe opposite wall of the chamber is formed by a flexible diaphragm, C, which is bound in place upon the annular member, A, by means of a top or front plate member, D, screwed into the member, A. The chamber of the casing is partitioned by a second diaphragm, E, which in lpractice may atvone position rest against the inner surface of the wall, B, of

the chamber, and is so shown, bein' bound Y. vit is thrust by the spring, Gr, so that the in place by said wall, B, screwed into the annular member, A.. rlhe two diaphragms are connected at their center by a post, F, passing through both dia hragms at the vcenter and bound Huid-tig t by any well lmown means'such as clamping nuts, H and Hl., The wall, B, of the chamber has a nipple, B1, through which there is formed an lnlet paage leading into the chamber,

an annulary which is conveniently enlarged so as to accommodate the clamping nut, H1, and also a spring, G, reacting against the shoulder, b1, formed by the enlargement of the inlet passage, and against the post, F, and diaphragm, E, through the medium of the clamping nut, H1, for thrusting the post, and thereby both the diaphragme, away from the inlet. The 'inlet passage through the nipple, B1, has a check valve, J, which opens for flow inward and may be provided with a spring, j, for seating it in the opposlte direction. The post, F, has a passage opening at one end through the side 'of the post into the'inter-diaphragm space, and at the other end through the end of the post in the inlet passage. ln the passage of the post there is provided a check valve, L, opening for flow inwardly,-that is, toward the inter-diaphragm space. rllhis check valve may be provided with a spring, l, tending to seat it in the opposite direction. Asv illustrated, for convenience of manufacture, the post is made in two parts, one part clamped to the diaphragm, C, and the other part `clamped to the diaphragm, E, the axial portion of the passage being made in the last mentioned part in which also the check valve is seated, having the spring, Z, coiled around its stem in the axial bore of said part of the post, said part of the post be ing reduced in diameter for a distance from the upper end, and the other end of the post being bored t receive the reduced end portion of the first mentioned part, the two parts 'having registering radial apertures, f and ft, for completing the passage into the inter-diaphragm space. The top or diaphragm-clamping member, D, has an eX- teriorly protruding and interiorly hollow diametrically extending boss, D2, at one end of which there is a'orded a seat at d2, for the fulcrum of a spring lever, M, which is a iatA steel vbar elastically flexible, which rests upon the upper end of the post, F, when the latter is at the position to which lever when operated at its free end,-where a notch, m, is provided to indicate means of engagement with any oscillating or reciprocating part, not shown, for operating it,-the post is thrust inward andthe diaphragms are thereby forced toward the in let, being forced back by the reaction of the spring, G, when the lever oscillates in IMM] Miti

the opposite direction. The lever, M, is designed to be merely stiff lenough to compress the spring, G, and'overcome any desired additional amount ofresistance whichv may be offered b v the pressure of a liquid column in the discharge pipe, P, or the reservoir to which it leads. From this characteristic of the construction. it will result that when the lever, M, is continuously oscillated, the inlet nipple, B1, being, connected with the liquid to be pumped, the liquid will be pumped up through the inlet and through the post, F, and out through the discharge -connection, P, from the interdiaphragm space, only until the resistance to the inwardthrust of the post and inward movement of the diaphragm, due to the pressure of the column of liquid which is being raised and upheld in the discharge pipe and any reservoir to which it leads, exceeds the stiffness of the lever; and then, although the lever continues to oscillate, no pumping will be done until the height of the column is diminished.

-In Fig. 3 there is shown a modification in which the lever is unyielding, but the post, F, is provided vwith a yielding terminal Ff, against which the lever operates, obviously with the same eli'ect as if the lever were yielding.

l. ln combination with a casing forming a chamber and'having an inlet through one side w'all thereof; a diaphragm forming the opposite wall of the chamber, a second diaphragm 'partitioning the chamber and inclosing at one side a space between it and the first mentioned diaphlagm, and at the other side a space between it and the wall having the inlet,.the chamber having an outlet for the nist-mentioned inclosed space; a post connecting the twol diaphragms and havinga passage opening at one end in the rst mentioned space and. at the other end in the second mentioned space;.check valves in the inlet passage and inthe post passage, both opening for Iiow toward the inter-diaphragm space, and yielding means for reciprocating the post and thereby vibrating both diaphra s simultaneously.

2. In comblnation with a casing `forming a chamber and having an inlet passage through one wall thereof, a diaphragm forming the opposite Wall of thechamber; a second diaphragm partitioning the chamber and inclosing at one side a space between it and the lirst mentioned diaphragm, and at the other side a space between it and the wall of the chamber having the inlet passa e, the chamber having an outlet passage rom the inter-diaphragm space; a

post connecting the two diaphragms, having a passage opening at one en into the inter-diaphragm space, and at the otherend into the other of said spaces; check valves in the inlet passage and in the post pas-A sage, both opening for How toward the inter-diaphragm space; a spring re-acting on the post for thrusting it away from the inlet; yielding means operating upon the 01pposite end of the post for thrusting it in t e opposite direction.

3. In combination with acasing forming a chamber and having an inlet through one wall thereof, a diaphragm formed in the opposite wall of the chamber; a second dia phragm partitioning the chamber and inclosing at one side a/ space between it and the first mentioned diaphragm, and at the other side a space between it and the wall -having the inlet, the chamber having an outlet leading from the inter-diaphragm space; a post connecting the two diaphragms and having a passage which opens at one end into the first mentioned space 4.and at the other end into the second menmy hand at New York, New York 'coun this 10 day of October, 1,916.

JULIA BQsTEwAR'r, Ewecutw o7" J 07m K. Stewart, deceased. 

